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Valach VM 120 B2-4T

SKU: VM7300


This product is currently not in stock.

Deliverytime: Demand

Product Description


The VM 120B2-4T is also available with a starter. You better think about your needs before you buy, as the starter cannot be economically retrofitted. It would need a different crankshaft, a different front crankcase and a costly disassembly of the engine.


Due to being a four stroke, the low vibration, is nothing but sensational, and torque is really high. The response to the throttle being opened is so smooth without the slightest attempt to surge, making the Valach 120 B2-4T absolutely ideal for your aerobatic model.
Being a four stroke with a large capacity produces a very realistic full-size aircraft sound. With a relatively small silencer the sound level is very low rather like a small saloon car.

The Valach VM 120 B2-4T is a four stroke OHV engine with two valves per cylinder, running on petrol/oil mixture. We have tried many oils and recommend Valvoline SynPower 2T oil. Our BEL-RAY H1R, although excellent for two strokes, is not ideal for four strokes, as it burns very well without deposit, therefore not much gets past the piston. With Valvoline Synpower 2T a lot more oil gets through to the crankcase. In Germany we recommend Aral Ultimate 102, as the smell is not so penetrating, it can be stored without deteriorating and it does not contain ethanol! If in your country petrol does not contain any ethanol, you can use any brand you like.

Valves and their seats are manufactured by Honda, ensuring a very high quality. The fully encapsulated valve train reduces sound as well as ensuring the rocker arms are well lubricated. The aluminium crankcase and cylinder heads are cast with the lost wax process, which enables a very light weight. The VM-120 B2-4T's casting surface finish gives a very realistic appearance.
The cylinder's nickel-silicon lining is far lighter than conventional steel cylinder liners.

The processer controlled ignition allows easy starting and a exceptionally smooth running in all throttle settings.

The Fiala propellers are very efficient, this being due to minimal blade thickness. They sound especially good on four stroke engines. Ideal Fiala two blade propeller sizes for the VM120: 30x12", 30x14" and 32x12". For aerobatics and glider towing the 30X12" is ideal. For big and slow flying vintage models, as is with Paolo´s Aeronca C3 and the Fokker EI, the 32x12" is the best choice

The fuel consumption is approximately 50% compared to that of a two-stroke engine with the same displacement. A 500cc fuel tank lasts for about 15-20 minutes of flying time.


Displacement: 120 cc
Bore: 47 mm
Stroke: 35 mm
Width including valve covers: 310 mm

Length from engine mount to prop hub:

167 mm

with Starter 185 mm

Engine weight with prop washer and prop bolts:

3450 g

with Starter 3930 g

Engine weight with ignition, prop washer and prop bolts:

3640 g

with Starter 4120 g

Ignition voltage range: 4,8 - 9 V
Fuel: 1:30

Fiala Prop 2-blade:


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Additional Information

Additional Information

SKU VM7300
Rating filter No
Brand Fiala / Valach motors
Cellnumber No
cilinder +120cc
crate No
helisize No
multirotortype No
planetype No
spanwidth No
color No
deliverytime Demand